package com.atguigu.gulimall.product.config;

import org.springframework.boot.autoconfigure.cache.CacheProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;

@EnableConfigurationProperties(CacheProperties.class)
@Configuration
@EnableCaching    //开启缓存功能
public class MyCacheConfig {
    @Bean
    RedisCacheConfiguration redisCacheConfiguration(CacheProperties cacheProperties){
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();

        //keys 的序列化器
        config = config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()));
        //value 的序列化器
        config = config.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(
                new GenericJackson2JsonRedisSerializer()));

        /**
         * 将配置文件中的所有配置都生效
         */
        CacheProperties.Redis redisProperties = cacheProperties.getRedis();    //拿到 redis 有关的所有配置
        if (redisProperties.getTimeToLive() != null) {
            config = config.entryTtl(redisProperties.getTimeToLive());    //过期时间
        }
        if (redisProperties.getKeyPrefix() != null) {
            config = config.prefixKeysWith(redisProperties.getKeyPrefix());    //key前缀
        }
        if (!redisProperties.isCacheNullValues()) {
            config = config.disableCachingNullValues();    //是否缓存空值
        }
        if (!redisProperties.isUseKeyPrefix()) {
            config = config.disableKeyPrefix();    //是否使用key前缀
        }
        return config;
    }}
